阅读说明：本技术 镍封孔后处理剂 (Nickel hole sealing post-treating agent ) 是由 陈国良 蔡少霞 于 2021-06-30 设计创作，主要内容包括：本发明涉及铝合金表面处理技术领域,具体涉及镍封孔后处理剂,由以下原料组成：钼酸钠、硼酸、柠檬酸钠、三聚磷酸钠、苯骈三氮唑；该镍封孔后处理剂,可以同时进行除镍及除灰；对铝材氧化膜层原有的颜色和光泽无影响；处理时间短,操作简单。(The invention relates to the technical field of aluminum alloy surface treatment, in particular to a nickel hole sealing post-treating agent which is prepared from the following raw materials: sodium molybdate, boric acid, sodium citrate, sodium tripolyphosphate and benzotriazole; the nickel hole sealing post-treating agent can simultaneously remove nickel and ash; the original color and luster of the aluminum oxide film layer are not affected; short treatment time and simple operation.)

1. The nickel hole sealing post-treating agent is characterized by comprising the following components in parts by weight: comprises the following raw material components: sodium molybdate, boric acid, sodium citrate, sodium tripolyphosphate and benzotriazole.

2. The nickel pore sealing post-treatment agent according to claim 1, characterized in that: the mass percentage of each raw material component is as follows: 30-35% of sodium molybdate, 27-30% of boric acid, 10-14% of sodium citrate, 5-8% of sodium tripolyphosphate and 15-20% of benzotriazole.

3. The nickel pore sealing post-treatment agent according to claim 1, characterized in that: when in use, the proportion of the nickel hole sealing post-treatment agent to water is 10%: 90 percent.

4. The nickel pore sealing post-treatment agent according to claim 1, characterized in that: the post-treatment temperature of the nickel hole sealing is 45-55 ℃.

5. The nickel pore sealing post-treatment agent according to claim 1, characterized in that: the treatment time after the nickel hole sealing is 5min-10 min.

Technical Field

The invention relates to the technical field of aluminum alloy surface treatment, in particular to a nickel hole sealing post-treatment agent.

Background

The aluminum material has good plasticity and large reserve amount, can be recycled, and has wide application in various industries. Aluminum products gradually enter people's daily lives, such as mobile phone shells, watches, luggage cases, cosmetic shells, and the like, and these products become tools used by people daily and come into contact with the skin of people every day. For the sake of beauty and durability, the products are subjected to anodic oxidation dyeing hole sealing treatment, most of the holes are sealed by nickel, and subsequent treatment is not carried out; the nickel ions remained on the surface of the aluminum product can harm the health of users and cause certain pollution to the environment, so an effective treatment method is urgently needed for the nickel residues on the surface of the aluminum product after nickel sealing.

In addition, in the hole sealing process of the aluminum material, black attachments are easy to remain on the surface to form a layer of dust scale, and the attachments are difficult to dissolve in water and cannot be removed by simple water washing. And if these attachments are not removed, the aesthetic appearance and performance of the product are affected.

In the current market, different auxiliaries are adopted for processing, namely two processes of nickel removal and ash removal are still needed after hole sealing, the process is complicated, and the processing time is long.

Disclosure of Invention

The invention provides a nickel hole sealing post-treatment agent, which can remove nickel and ash simultaneously. The method has the advantages of high nickel and ash removal speed and good effect, and can not cause the oxide film to generate a matte effect.

In order to achieve the purpose, the invention provides the following technical scheme: the nickel hole sealing post-treating agent comprises the following raw material components: sodium molybdate and sodium lacrimal acid are used as corrosion inhibitors; boric acid, which mainly plays a role in pH buffering; sodium citrate, sodium citrate as builder; sodium tripolyphosphate, which has metal chelation; the benzotriazole and the benzotriazole have the auxiliary effect of improving the corrosion inhibition effect.

Preferably, the mass percentages of the raw material components are as follows: 30-35% of sodium molybdate, 27-30% of boric acid, 10-14% of sodium citrate, 5-8% of sodium tripolyphosphate and 15-20% of benzotriazole.

Preferably, when in use, the proportion of the nickel hole sealing post-treatment agent to water is 10%: 90 percent and the powder proportion is less than 10 percent, the effect of thoroughly removing nickel and ash in the aluminum material can not be achieved, the time consumption is long, and the powder is difficult to dissolve in water when the powder proportion is more than 10 percent.

Preferably, the post-treatment temperature of the nickel hole sealing is 45-55 ℃, the effect of the post-treatment agent of the nickel hole sealing is not obvious when the post-treatment temperature is lower than 45 ℃, and the effect of the post-treatment agent of the nickel hole sealing is the same when the post-treatment agent of the nickel hole sealing is higher than 55 ℃ as that of the post-treatment agent of the nickel hole sealing when the post-treatment temperature is lower than 55 ℃, so unnecessary energy consumption can be caused when the post-treatment temperature is higher than 55 ℃.

Preferably, the treatment time after the nickel hole sealing is 5min to 10min, the treatment time of the nickel hole sealing post-treatment agent is less than 5min, the effect of completely removing dust and nickel cannot be achieved, and after more than 10min, the effect is not obviously improved, so that unnecessary time and energy waste can be caused.

Compared with the prior art, the invention has the beneficial effects that: the post-treatment agent for the nickel hole sealing,

(1) nickel removal and ash removal can be simultaneously carried out;

(2) the original color and luster of the aluminum oxide film layer are not affected;

(3) short treatment time and simple operation.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows: the nickel hole sealing post-treating agent comprises the following components: 35% of sodium molybdate, 30% of boric acid, 10% of sodium citrate, 5% of sodium tripolyphosphate and 20% of benzotriazole.

Weighing the raw materials in the weight ratio, crushing, mixing and stirring to obtain a powdery nickel hole sealing post-treatment agent; dissolving the powdery nickel hole sealing post-treatment agent by using pure water according to the weight ratio of 10% of powder to 90% of water, and carrying out nickel hole sealing post-treatment on the aluminum material by using the dissolved nickel hole sealing post-treatment agent at the temperature of 55 ℃ for 5 minutes.

Example two: the nickel hole sealing post-treating agent comprises the following components: 30% of sodium molybdate, 30% of boric acid, 14% of sodium citrate, 8% of sodium tripolyphosphate and 18% of benzotriazole.

Weighing the raw materials in the weight ratio, crushing, mixing and stirring to obtain a powdery nickel hole sealing post-treatment agent; dissolving the powdery nickel hole sealing post-treatment agent by using pure water according to the weight ratio of 10% of powder to 90% of water, and carrying out nickel hole sealing post-treatment on the aluminum material by using the dissolved nickel hole sealing post-treatment agent at the temperature of 50 ℃ for 7 minutes.

Example three: the nickel hole sealing post-treating agent comprises the following components: 34% of sodium molybdate, 27% of boric acid, 13% of sodium citrate, 7% of sodium tripolyphosphate and 19% of benzotriazole.

Weighing the raw materials in the weight ratio, crushing, mixing and stirring to obtain a powdery nickel hole sealing post-treatment agent; dissolving the powdery nickel hole sealing post-treatment agent by using pure water according to the weight ratio of 10% of powder to 90% of water, and carrying out nickel hole sealing post-treatment on the aluminum material by using the dissolved nickel hole sealing post-treatment agent at the temperature of 47 ℃ for 10 minutes.

Example four: the nickel hole sealing post-treating agent comprises the following components: 34% of sodium molybdate, 29% of boric acid, 14% of sodium citrate, 8% of sodium tripolyphosphate and 15% of benzotriazole.

Weighing the raw materials in the weight ratio, crushing, mixing and stirring to obtain a powdery nickel hole sealing post-treatment agent; dissolving the powdery nickel hole sealing post-treatment agent by using pure water according to the weight ratio of 10% of powder to 90% of water, and carrying out nickel hole sealing post-treatment on the aluminum material by using the dissolved nickel hole sealing post-treatment agent at the temperature of 45 ℃ for 10 minutes.

The aluminum material treatment process comprises the following steps: anodizing, dyeing, hole sealing, nickel hole sealing post-treatment and drying, wherein part of samples of the nickel hole sealing post-treatment agent prepared in the examples 1 to 4 are taken as samples 1 to 4, and a common ash remover and a common nickel remover in the market are taken as a control group to perform hole sealing post-treatment on the surface of the aluminum material:

method for testing nickel removal degree

Firstly, dipping alcohol on the surface of a sample by using a cotton swab to wipe the surface of the sample; wiping the test surface of the aluminum material sample for 15s by using a white cotton swab containing 1-2 drops of 0.8% dimethylglyoxime and 1 drop of 10% ammonia water, and observing whether the cotton swab appears pink/red; if the red color appears, judging that nickel exists; a small amount of nickel is judged to be present when the color is pink; if no color, no nickel is present.

Second, ash removal effect test method

Visual method: the sample was placed under D65 light to see if there was ash, and then half of the ash was wiped off with a finger to see if the ash was removed completely.

Third, glossiness testing method

The glossiness of the treated and untreated aluminum sheets was measured by a gloss meter, and the degree of influence on the glossiness was determined by comparing the gloss difference before and after treatment.

Fourth, UV-resistant testing method

The sample was cut in half, half tested using a UV machine and half left for comparison, with the following test conditions: light source: UVA-340; the illumination intensity is as follows: 0.68W/m2 nm; temperature: 63 ℃; duration of continuous irradiation: 96 h; and measuring the color difference delta E between the illuminated state and the non-illuminated state by using a color difference meter after the test, and judging no influence if the color difference value is less than 1.

Fifth, heat resistance test method

Cutting the sample into two halves, carrying out heat resistance test on one half, keeping the other half for comparison, baking by using a constant-temperature drying oven, and testing conditions are as follows: temperature: 200 ℃; baking time length: 2 h; and after the test, measuring the color difference delta E between the baked color difference and the unbaked color difference by using a color difference meter, and judging no influence if the color difference value is less than 1.

Table 1 shows the test results of the aluminum materials treated by the nickel hole sealing post-treating agent and the ash remover and the nickel remover on the market;

TABLE 1

As can be seen from the test results in the table 1, the dust remover can only carry out dust removal treatment on the aluminum material, and the dust remover has no influence on the glossiness, UV resistance and heat resistance of the treated aluminum sheet, but has no effect on nickel removal; the nickel removing agent can only carry out nickel removing treatment on the aluminum material, has no effect on the ash removal of the aluminum material, and has influence on the glossiness of the treated aluminum sheet, so that the glossiness of the surface of the aluminum sheet is deteriorated, and the UV resistance and the heat resistance are not influenced;

in examples 1 to 4, after the aluminum material after the nickel hole sealing is treated by the nickel hole sealing post-treatment agent, the glossiness, the UV resistance and the heat resistance of the aluminum material after the hole sealing are not affected, and the aluminum material has an obvious nickel removing effect and an obvious ash removing effect, so that an ideal nickel removing and ash removing effect can be achieved after the aluminum material is used; meanwhile, the effects of nickel removal and ash removal are also influenced by the treatment time of the nickel hole sealing post-treatment agent, and the nickel and impurities on the surface of the aluminum material are slightly remained after the treatment for 5 minutes; after the treatment is carried out for 7 minutes, the nickel on the surface of the aluminum material is slightly remained, the impurities are completely removed, and after the treatment is carried out for 10 minutes, the nickel and the impurities on the surface of the aluminum material are completely removed.

The invention has the beneficial effects that: the post-treatment agent for the nickel hole sealing,

(1) the nickel and ash can be removed simultaneously;

(2) the original color and luster of the aluminum oxide film layer are not affected;

(3) short treatment time and simple operation.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.